Detection instrument



FIG. 1 is a top perspective view of a detection instrument;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a bottom perspective view thereof; and,

FIG. 8 is another bottom perspective view thereof. 

CLAIM The ornamental design for a detection instrument, as shown and described. 